Diminishing Returns to Higher Education

The U.S. Census Bureau has updated its data (Excel Spreadsheet) showing the percentage of Americans, Age 25 or older, who have attended four or more years of college. Our first chart shows how those figures have changed since 1940 for American men and women.
We observe that there are approximately six times the percentage of Americans who have completed at least four years of college in 2013 than there were in 1940. More...